#
# Copyright (C) 2023 by frePPLe bv
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#

from django.db import migrations, connections
from django.conf import settings


def grant_read_access(apps, schema_editor):
    db = schema_editor.connection.alias
    role = settings.DATABASES[db].get("SQL_ROLE", "report_role")
    if role:
        with connections[db].cursor() as cursor:
            cursor.execute("select count(*) from pg_roles where rolname = lower(%s)", (role,))
            if not cursor.fetchone()[0]:
                cursor.execute(
                    "create role %s with nologin noinherit role current_user" % (role,)
                )
            for table in ["ax_demand", "ax_buffer", "ax_operationplan"]:
                cursor.execute("grant select on table %s to %s" % (table, role))


class Migration(migrations.Migration):
    dependencies = [
        ("archive", "0004_truncate_archive"),
    ]

    operations = [
        migrations.RunPython(
            code=grant_read_access,
        ),
    ]
